Tuesday, 23 October 2012

Details You Should Know About the Studio 1749 Battery

Whether you are using a 9-cell battery or a 6-cell Studio 1749 battery for your notebook, long life of your device is virtually guaranteed. In having one of these batteries installed in your notebook you can go about your work without any disturbance or without having the need to recharge your device now and then.
The need for a quality battery is felt when you need to work uninterruptedly. During the times when you are traveling or in meetings, it is important that you keep your productivity levels high. The only way you can guarantee this is in having a reliable battery. This is where the 1749 battery can make all the difference. The newly developed batteries are designed in a way to meet all the specifications and come with a one year warranty. Its manufacturers also promise of returning customers money within 30 days should there be any manufacturing defect with the storage device.
The 1749 batteries that can be used with Dell notebooks come with a certificate that reiterates their quality. They are designed and manufactured in an environmental friendly way to ensure they do not pollute its surroundings with the discharge of mercury, cadmium and lead.
The grade cells and other vital components that are required in making these storage devices are carefully selected. They are then assembled in different facilities with great care and attention. The modern-day notebooks that use these batteries run for a long time without being recharged. Also, their lifetime is pretty impressive. The manufacturers provide all kinds of assistance to its customers should there be any problem with the battery. For customers, it is really important that they pick these devices at genuine centers and then get it installed in their devices properly.
What is so special with 1749 batteries is that there are compatible with a number of notebooks and are of high quality. They are offered to customers with certificates that guarantee the authenticity of the product. Each of these batteries is tested carefully before being released into the market.
However, customers are advised to fully recharge their Studio 1749 battery before using them in their notebook. A quick reference to the manufacturer's guide in this regard should help a lot. Also make sure that the battery is stored at appropriate temperatures. It is recommended to use different power saving controls of your notebook to use the battery effectively. For example, reducing the brightness of the screen and turning off the Bluetooth will help increase the lifespan of the 1749 battery.

Dell 2155CN Printer Review

Overview
The Dell 2155cn is a laser printer that offers many features that allow you to get the job done with value and execution. This printer offers features that are both good and bad. The good features include a sufficient printing speed, a big tray for holding paper, and 256MB of memory already installed. The bad features include being bulky and big in design and it does not offer duplex features that are automatic.
Pros
This printer does not offer the highest resolution that you see in other multifunctional printers, but it does produce pictures that are lucid, vivid, and have wonderful color at 600x600 dots per inch. This laser printer allows up to 40,000 pages per month, which is not meant to cause any damage to the printer or major wear and tear.
The printing speeds you would find on a normal printer are basically what you will find with the Dell 2155cn. It does print in both black and white and color, at a rate of 24 pages each minute. Since there is not an automatic duplex option available so the only way that you can print on both sides of the paper is to perform this function manually.
The Dell 2155cn does offer other options that improve the printers functioning ability. There is an Ethernet port which allows the user to network multiple computers to the printer. While there are not any built-in wireless options if does have a port for an external wireless device. It also has the ability to print from a flash drive or camera as it has a USB 2.0 port.
The laser printer comes equipped with a paper tray that will hold 250 pages. The ability to hold so much paper helps cut down on restocking frequently. The printer can use all kinds of paper from original and dense paper, envelopes, labels, postcards and coated paper. If you have paper that measures 8.5 x 14 inches, it can print on that as well. While it offers installed memory it is not Energy Star rated.
Cons
This printer takes up a large space as it is large and heavy. It measures in at 22.81 inches tall, 17.1 inches wide, and 21 inches thick, which is some of the greatest factors on a laser printer. Not only is it bulky but it weighs 66 pounds.
The control panel is set on the top of the device and has a small screen that will help you with the printer's options and settings. The printer has quite a few buttons, and the display panel makes it confusing to use.
While this laser printer offers many functions it does have its setbacks. These include duplex printing, largeness, and interface issues. But overall it does have a lot of functions that make it a very usable laser printer for an office. The ability to network and the large amount of installed memory is definitely a bonus on this printer. Also the ability to hold a large amount of paper makes it convenient.

Tuesday, 18 September 2012

How to Find Your Printer Manufacturer

With several printer brands having invaded the market, it is particularly hard to choose the best one. The problem is rather complex, since every manufacturer is now coming up with printers having the latest features incorporated in them, like the Continuous Ink Supply system and All-In-One printing. Some brands, however, stand out from other based on their price, features and reliability. The best way to figure out which manufacturer you should buy from is to go through the general features every manufacturer has to offer and, then, to review particular models.
Hewlett Packard
When it comes to affordable printers, HP has been regarded by many as the best value for money. These printers come in cheaper prices than most Canon and Espon models, thus being more easily affordable. The printers are highly reliable, with the most popular models being 7510 All-In-One and the Multifunction Laser-jet Pro series. The former is particularly popular due to the LCD touch screen. In general, HP printers are inexpensive, easy to set up and to use.
Epson
Epson is yet another common brand, with models available from as low as $50 up to $300. The most successful models, perhaps, are those in the Workforce Pro series. The printers have been rated to be easy to set up and simple to use, particularly due to their wireless function. The color printing capability has been particularly appreciated by users, as has the photo printing quality. Espon beats others with its warranty offers, which allows a replacement free of cost. Also, the printer ink is much more affordable than that of other manufacturers.
Brother
Brother printers are widely used, owing to the fact that they offer models priced as low as $99. With their affordability and automatic duplex, they have been widely preferred. The more costly models in the HL and Brother series are also particularly reliable. The printing is fast, with a good text output. Many users, however, have faced troubles with beginning to use their printers and complain of the set-up being complicated.
Canon
Considering ink jet printers, Canon printers are probably the fastest. From usual prints to professional photos, the results of Canon printers have been great. At average, Canon printers are priced higher than other famous ones like HP and Espon. These are, however, reliable and long lasting. From the 6-color Pixma series to photo printers like Canon Selphy, the printers are particularly durable, though some models, like the Pixma MG6150, have been accused of using enormous volumes of ink at every start-up and facing occasional pauses during printing.

How Does RAS Impact Your IT Environment?

RAS: Reliability, Availability and Serviceability. What does this term really mean? And how does it impact your IT environment at your company?
Reliability: Reliability refers the ability of your IT system to consistently perform according to its specifications. There should be features implemented to uncover and reveal faults in your computing equipment. A reliable computing system, whether it's your data servers or your data storage equipment should be able to detect corrupted data and instead of continuing to use bad data or worsen the problem, is able to alert you to the problem, and if your system is advanced enough, begin to repair the problem.
Availability: Availability is the amount of time your system is actually running versus the amount of time it is expected or required to perform. Different availability features allow your IT system to remain up and running even when there are failures or data corruptions found. It can also be expressed in terms of average downtime per week, month or year or as total downtime for a given week, month or year. Salespeople will often speak about availability in terms of slowed down systems (for instance, they will say your server can operate at 80% throughput capacity even if two data ports are down). A highly available system can disable a malfunctioning part and continue operating, at a reduced but still manageable capacity. A poorly available system might completely crash and be non-operational.
Serviceability: Serviceability addresses the ease with which a system can be repaired, maintained or serviced without critically impacting your ability to use the system while this is happening. Maintenance and repair should affect your system as little as possible, and a more serviceable IT environment can handle this work without causing disruption for users.
Some of the more commonly used methods to build RAS capabilities include:
Redundant power: Especially in large storage systems, AC power from two separate electrical loops is implemented to avoid complete power-downs should an electrical circuit in the building fail. In addition, many data storage systems will be delivered with two internal batteries that are powerful to last through a complete data recovery process should AC power fail from all external sources.
Duplication: The design of redundant systems and components is used to ensure that there is no single point of failure inside that could cause failure and loss of access to data.
Data backup: A key component of a fully enabled RAS environment, regular backup of your data to tape or disk library storage systems ensures that should something catastrophic happen to your primary IT environment, you still have a way to recreate and move forward with the customer data or business data that is vital to your company's operations.
Power-on replacement: A development that has come about in the past 10 years, being able to "hot swap" electrical components while the larger server or storage system is still running has drastically increased both availability and serviceability in the IT world. Individual faulty components like communication cards or power supplies can be powered down on their own when you require tape library repair service, swapped for fully functioning ones and then restarted to become part of the larger, functioning system again.
Over-engineering: Particularly in the area of mechanical failure (vibration, moving parts, temperature and voltage among others), over-designing to stay well within failure parameters creates a more robust and adaptable system. Designing systems to specifications better than minimum requirements allows for occasional exceptions where a machine is briefly exposed to too much vibration or an accidental temperature spike in the office that otherwise would cause an immediate failure.
A term that was originally coined at IBM to describe the robustness and superiority of their products, it has been adopted across the electronics world and can be used to discuss computing products with almost anyone these days. Be sure you're asking questions about the RAS side of any environment being designed, maintained or operated for your company's IT needs.

Monday, 17 September 2012

How the Number of Antennas Affect Wireless Router Performance (MIMO)?

At the time when Wireless vendors introduced the wireless router in market, most of the devices had one antenna. That means the single antenna would send and receive wireless signals. However, now it is the time of Multiple Input Multiple Output technology. In MIMO (short form of Multiple Input Multiple Output), AP (Access Point) is able to send and receive wireless signals over multiple antennas. This feature improved the efficiency of the Wireless router compared to traditional single antenna routers.
How the Number of Antennas Improves Signal Quality
There are many factors which affect quality of the signal. Those factors include:
1. Wireless Range
2. Interference
3. Echo handling
4. Wireless Bandwidth
1. Range
Range is a very important factor. To improve the wireless range of an Access Point either we can use a powerful antenna or use multiple ordinary antennas. experiments say it is wise to use multiple antennas instead of using single powerful antenna. Here MIMO plays a big role in increasing the signal-range as MIMO lets the AP use multiple channels.
2. Avoid Interference
We are using many devices which emit wireless signals. So there is a chance of interference which can badly affect quality of AP. Using multiple channels we can reduce the chances of possible interference with other wireless devices.
3. Echo handling
Another important point we should consider while using wireless router is the possibility of echo. Echo can reduce the performance of the device and the quality of the network. Echo badly affect the signal we receive and its quality will be less than actually it meant for. AP needs at least three antennas to reduce the effect of echo.
4. Bandwidth
MIMO has a vital role in improving the bandwidth.
Which Wireless Standards support MIMO
Practically IEEE802.11n standard supports Multiple Input Multiple Output Standard. So we can see all the multiple antenna routers belongs to wireless n standard. In addition to 802.11n, MIMO is supported by 4G, WiMAX, HSPA+ etc. It shows future technologies cannot avoid the use of Multiple Input Multiple Output technology.
Predecessors of MIMO
MIMO is not a Standalone technology. It comes from a set of standards. They are:
1. SISO
2. SIMO
3. MISO
In SISO (Single Input Single Output) AP does not have multiple channels to receive and send signal. In SIMO (Single Input Multiple Output) device can transmit signal through single channel only. MISO (Multiple Input Single Output) is opposite to SIMO where device can transmit though multiple channels. So we can see MIMO is derived by combining the SISO, SIMO and MISO standards.


Wednesday, 12 September 2012

Performance Analysis of ThinkPad X1 Carbon

On August 6, 2012, Lenovo Group held a world premiere activity for its new product, ThinkPad X1 Carbon, the first carbon fiber ultrabook in the PC industry. This represented the advent of the lightest 14-inch X1 Carbon in the world. On August 9, ThinkPad X1 Carbon began to accept bookings. In addition to inherit classic elements of ThinkPad, the brand new ThinkPad X1 Carbon has its own features: high quality-made of carbon fiber material, ultra-thin design with its minimum up to 8mm, IVB core processor and ultra-long standby time. This ultrabook called Black Macbook is priced 9699RMB in China, an unexpected price indeed.
Well, does the ThinkPad X1 Carbon perform well? Many tests on its performance have been made, and now we will analyze the data so that all of us can have a better understanding towards its performance.
ThinkPad X1 Carbon is equipped with Core i5-342U, Intel's new generation of IVB, and a 1.8GHz processor it can be boost to 2.8GHz by Turo). Besides, it possesses a 4GB DDR3-1600 memory, a 128GB SSD and a HD 4000 graphics.
Performance test
Processor:
Lenovo has 3 options in selecting the CPU for ThinkPad X1 Carbon, Intel Core I8-3667U, Intel Core I5-3427U and Intel Core i5-3317U. From the results of the tests we can see that the performance of the Core I5-3427U processor is in medium level among the current ultrabooks.
HD Graphics:
As HD 4000 graphics is a mainstream equipment of the current ultrabooks, it can meet basic needs for use although its performance is incompatible to those ultrabooks with single graphics.
PCMark Vantage:
It is obvious that the ThinkPad X1 Carbon ranks first or second in terms of PCMark Vantage. Both of its test results are on the leading position because of the effective assistance from SSD.
Battery Life:
The environment for testing ThinkPad X1 Carbon: adjust the screen brightness to 70%, open wireless network, and adjust the power management of Window 7 for balance. Under this circumstance, the battery keeps working for 5 hours and 56 minutes. The result reflects the fact that its battery life is merely stronger than its old version of X1. As the battery can't be replaced, can the up to 6 hours of working time support the use for a business trip?
According to the above test results, we can make the following conclusions. The performance of ThinkPad X1Carbon is above the average level. Although its CPU belongs to low voltage version, it works rather well. Meanwhile, the HD 4000 graphics is incompatible to those single graphics, but it meets the needs for HD video display and for mainstream games. In the PCMark Vantage, ThinkPad X1 Carbon performs very well with its test results at the top of the list. It is adequate to deal with office work. As for its battery life, I think its working life should be longer than 6 hours. As its working life can be affected by power equipments and working environment, I think it will be improved if Lenovo's power management software is applied after the ultrabook comes into the market.
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Know Why Ainol Novo 7 Aurora II Cortex Tablet Is Popular

Ainol Novo7 Aurora II Cortex is a tablet computer from the stables of Ainol Electronics Company Limited. The specialty about this gadget is that it has the latest Dual Core Cortex-A9 Amlogic8726-M6 1.5GHz processor. The reason the company has decided to use a dual core processor is because of its benefits. Since both the cores will be in close proximity on the same die in a dual core processor, the cache coherency circuitry will be able to operate at a higher clock rate. The performance of the processing unit is enhanced because of the combined effect of the cores. Since signals will be traveling shorter distances, their degradation will be much less. So, it is possible to send more data with a dual core processor. Further, the power used in a dual-core processor will be less also. Simply put, users can get higher performance with less energy.
As far as the Graphical Processing Unit of Ainol Novo 7 Aurora II Cortex is concerned, it has a MALI 400 processor. The operating system used on this tablet is Google Android 4.0.3 and the method for operating this is through a 5 points capacitance touch screen. Android 4.0.3 platform can help in a variety of optimizations. It can help for fixing bugs also on tablet computers. Perhaps, that is the reason the company has opted for this Android 4.0.3 platform.
The RAM used on this tablet is DDR3 1G 1333MHZ and the Flash Memory is 16GB Nandflash. The gadget has a very attractive 7 inch TFT LCD Multi-touch HD IPS Capacitive screen with a resolution of 1024 x 600 Pixels. Only a front camera of 2.0 Mega Pixels is available on this tablet. There is a built-in 3700 mAh Lithium battery on this. According to the company, the battery standby will be there for about 14 hours.
This tablet can support several languages starting from Arabic to Russian, Chinese, Ukranian, Vietnamese and so on.
The general consensus of reviewers is that this tablet is the fastest among the existing gadgets. In fact, when the company started releasing Ainol Novo products, no one imagined that these tablets will capture the market to this extent because the initial response was only modest. But, many people in US and other countries have started switching to this gadget. Of course, the popularity of this tablet is purely demand driven.
The cost of Ainol Novo 7 Aurora II Cortex tablet is quite reasonable and this is certainly an added benefit for all the consumers who earn various levels of income. The company seems to have done a remarkable research about the expectations of consumers before releasing the Ainol Novo tablet computers. This has made the world suddenly sit up and take note of these products. The robustness of these gadgets is in contrast to the other products from other contemporary companies.
If consumers make an in-depth study of the features of this tablet, they will not hesitate to have this gadget. The company is also taking all steps to educate consumers about the efficacy of this gadget.